Theoretical models suggest that gratitude is linked to increased prosociality. To date,
however, there is a lack of a comprehensive quantitative synthesis of results to support this …

Despite envy's importance as a driver of social behavior, scholars disagree on its
conceptualization. We review the literature and distinguish three incongruent theories:(a) …

Abstract Third-party punishment (TPP),,,,,,, in which unaffected observers punish selfishness,
promotes cooperation by deterring defection. But why should individuals choose to bear the …

Altruistic punishment (or punishment) has been extensively shown as an important
mechanism for promoting cooperation in human societies. In AI, the emergence of …

What explains variability in norms of cooperation across organizations and cultures? One
answer comes from the tendency of individuals to internalize typically successful behaviors …

Are people more generous when less money is at stake? The Ultimatum Game (UG) and
Dictator Game (DG) are often used as models of bargaining and charitable giving …

Moralistic punishment can confer reputation benefits by signaling trustworthiness to
observers. However, why do people punish even when nobody is watching? We argue that …

Third-party intervention, such as when a crowd stops a mugger, is common. Yet it seems
irrational because it has real costs but may provide no personal benefits. In a laboratory …

We explore the signal value of emotion and reason in human cooperation. Across four
experiments utilizing dyadic prisoner dilemma games, we establish three central results …

Traditionally, information has been assumed to never harm consumers, a notion recently
challenged. Salience nudges have been argued to evoke negative emotions, therefore …